Study on automatic relaying algorithm for PLC based on channel state

Relaying communication is a necessary means to improve the reliability of Meter Reading System (MRS) based on Power Line Carrier (PLC), but the searching for relaying path is one of the biggest challenges. According to the characteristics of PLC networks, an adaptive automatic relaying method based on the parameters of power line channel state and improved ant colony optimization algorithm is put forward in this paper. In the proposed algorithm, the restricted candidate list (RCL) strategy utilizing the greed stochastic adaptive searching method is also introduced according to the parameters of channel. The simulation and experimental results indicate that the algorithm can be adaptive to the channel state´s change by updating routing table dynamically, effectively improve the accuracy of relay and the success rate, and improve the search efficiency.